Enhancement of superconducting critical temperature in Bi(Pb)-Sr-Ca-Cu-O system by Li-doping

Authors: Nguyễn Khắc Mẫn*

Abstract

We have studied the superconducting transition of the high-Tc Li-doped Bi(Pb)-Sr-Ca-Cu-O superconductors by the DC-resistivity and AC-susceptibility measurements. It was found that Li+ cations are partially substituted for Cu2+ ions. Doping hole by Lithium substitution was supposed to take place in both OP and IP CuO2 planes. Consequently, the hole concentration increases in the CuO2 planes. The onset temperature of superconducting transition, Tc, onset was observed to increase with Li-doping content as well as the sintering time at 850oC. We suppose that the optimum hole doping was obtained at 5% Li-doping and the sintering period of 20 days (S05B) with the value of Tc, onset > 116 K.

Keyword

High-Tc superconductivity, Li-doping, Bi-2223, Bi-2212
Pages : 60-66

Related Articles:

Authors : nguyễn thu hà*, Cao Hồng Hà, Nguyễn Phạm Duy Linh, Phan Trung Nghĩa
Authors : Nguyễn Thị Thu Hiền*, Trần Quốc Hoàn, Đặng Việt Anh Dũng, Trần Đức Huy, Phạm Anh Tuân, Nguyễn Hữu Dũng, Vũ Ngọc Phan, Nguyễn Duy Cường*
Authors : Vương Văn Thanh*, Nguyễn Tuấn Hưng, Đỗ Văn Trường
Authors : Lai Van Duy, Nguyen Duc Hoa, Nguyen Hong Hanh, Chu Manh Hung
Authors : Le Duc Hien*, Dao Thi Thuy Nguyet*, Nguyen Phuc Duong
Authors : Chu Thi Quy, Chu Manh Hung, Bui Thi Hang, Nguyen Duc Hoa*